cp's OEIS Frontend

A208004 Number of nX5 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 1 1 and 1 1 0 vertically.

%I A208004 #7 Jul 22 2025 21:05:46
%S A208004 14,196,618,1711,7016,24512,106503,411848,1787438,7238503,31139116,
%T A208004 128898716,550671103,2303973916,9799872866,41220045503,174880633792,
%U A208004 737543803528,3124620453847,13195708252672,55859776281926
%N A208004 Number of nX5 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 1 1 and 1 1 0 vertically.
%C A208004 Column 5 of A208007
%H A208004 R. H. Hardin, <a href="/A208004/b208004.txt">Table of n, a(n) for n = 1..210</a>
%F A208004 Empirical: a(n) = 9*a(n-1) -10*a(n-2) -106*a(n-3) +272*a(n-4) +170*a(n-5) -936*a(n-6) +306*a(n-7) +898*a(n-8) -558*a(n-9) -224*a(n-10) +190*a(n-11) +a(n-12) -11*a(n-13) for n>14
%e A208004 Some solutions for n=4
%e A208004 ..0..1..1..0..1....0..1..1..1..1....0..0..0..0..0....1..1..1..0..1
%e A208004 ..1..1..1..0..1....0..1..0..1..1....1..0..1..0..1....1..0..1..1..0
%e A208004 ..0..1..1..1..1....0..1..0..1..1....0..1..0..1..0....1..1..1..0..1
%e A208004 ..0..1..1..0..1....0..1..1..1..1....1..0..1..0..1....1..0..1..1..0
%K A208004 nonn
%O A208004 1,1
%A A208004 _R. H. Hardin_ Feb 22 2012